WO2023240885A1

WO2023240885A1 - Battery pack and vehicle

Info

Publication number: WO2023240885A1
Application number: PCT/CN2022/127870
Authority: WO
Inventors: 黄伟才
Original assignee: 湖北亿纬动力有限公司
Priority date: 2022-06-17
Filing date: 2022-10-27
Publication date: 2023-12-21
Also published as: CN217788664U

Abstract

Disclosed in the present application are a battery pack and a vehicle. The battery pack comprises a case having a bottom protection plate and a cross beam arranged in the case, wherein the cross beam comprises a body and a mount structure integrally formed with the body; the cross beam is connected to the bottom protection plate; and the mount structure is connected to the bottom protection plate in a sealed manner, is provided with a connecting hole, and is connected to an external structure by means of the connecting hole. According to the battery pack and the vehicle in the present application, the problems in the prior art of a mount structure having a complex structure, a large mounting size, and being difficult in terms of waterproof sealing and complex in terms of assembly operation are solved.

Description

Battery packs and vehicles

This application claims priority to the Chinese patent application with application number 202221526571.5, which was submitted to the China Patent Office on June 17, 2022. The entire content of this application is incorporated into this application by reference.

Technical field

This application relates to the field of battery technology, for example, to a battery pack and a vehicle.

Background technique

In the battery pack mounting structure of the related art, the mounting structure is installed on the battery pack box. The mounting structure includes multiple parts that cooperate with each other. It has the following shortcomings: First, the mounting structure will add additional components. Production cost; second, sealing connections are required between parts, and between the mounting structure and the box, which results in more sealing locations, a complex structure, and increases the probability of waterproofing failure, greatly increasing the risk factor; third, The mounting structure needs to be assembled. When the box space is compact, it is difficult to free up enough installation space, which increases the difficulty of assembly. Fourthly, when the mounting structure is installed on the beam of the box, the beam needs to be dug and the mounting structure passes through. However, it will reduce the structural strength of the beam, and the beam may easily break in harsh vibration environments.

Contents of the invention

The present application provides a battery pack and a vehicle, which can solve the problems in the related art that the mounting structure is complex, the installation size is large, the waterproof sealing is difficult, and the assembly operation is complex.

In a first aspect, embodiments of the present application provide a battery pack, including a box with a bottom guard and a crossbeam provided in the box. The crossbeam includes a body and a mounting structure integrally formed with the body. , the cross beam is connected to the bottom guard plate, the mounting structure is sealingly connected to the bottom guard plate, the mounting structure is provided with a connection hole, and the mounting structure communicates with the external structure through the connection hole connect.

In one embodiment, the bottom guard is provided with mounting holes, the mounting structure includes a first boss protruding from the side of the body facing the bottom guard, and part of the connection holes is provided in the bottom guard. In the first boss, the first boss penetrates the mounting hole, and the first boss is sealingly connected with the mounting hole.

In one embodiment, the first boss is welded to the mounting hole.

In one embodiment, the connection hole is a communication hole.

In one embodiment, the mounting structure includes a second boss protruding from a side of the body away from the bottom guard, and part of the connection holes is opened in the second boss.

In one embodiment, the connecting hole includes a threaded hole opened in the second boss.

In one embodiment, the mounting structure further includes a splicing component located on the side of the second boss away from the body, the splicing component is detachably connected to the connection hole, and the splicing component is provided with holes, through which the mounting structure is connected to the external structure.

In one embodiment, the splicing assembly includes a cylinder and a nut with a connecting rod at one end. The cylinder is sealingly connected to the connecting hole of the second boss, and the connecting rod is sealingly connected to the cylinder away from the connecting hole. On one side of the second boss, the internal threaded hole of the nut forms the hole groove, or the internal threaded hole of the nut communicates with the first hole structure on the connecting rod to form the hole groove, or , the internal threaded hole of the nut communicates with the first hole structure on the connecting rod and the second hole structure on the cylinder to form the hole groove.

In one embodiment, the mounting structure and the beam are formed by casting.

In one embodiment, the battery pack further includes a battery module provided on the bottom guard, the body is provided with a first hole, the battery module is provided with a second hole, and bolts are inserted through The first hole position and the second hole position are used to connect the battery module and the main body.

In one embodiment, the mounting structure includes a first boss protruding from a side of the body facing the bottom guard, and the first boss is cylindrical.

In one embodiment, the mounting structure includes a second boss protruding from a side of the body away from the bottom guard, and the second boss is in the shape of a truncated cone.

In a second aspect, embodiments of the present application provide a vehicle, including the above-mentioned battery pack.

Beneficial effects of this application:

This application provides a battery pack and vehicle. The mounting structure and the body are integrally formed to form a cross beam. The cross beam can be installed in the box and connected to the bottom guard plate. The installation operation is more convenient, the number of parts is reduced, the structure is simplified, and the Sealed installation greatly improves waterproof reliability and reduces the risk factor; there is no need to assemble the mounting structure separately, which improves production efficiency and applicability to the box space; there is no need to dig holes in the beams for mounting mounting structure, which improves the structural strength of the beam and improves the anti-vibration performance. It solves a series of problems such as large installation size, difficulty in waterproof sealing, and complex assembly operations of independently installed mounting structures in related technologies.

Description of the drawings

Figure 1 is a schematic structural diagram of a beam from a perspective provided by an embodiment of the present application;

Figure 2 is a schematic structural diagram of a beam from another perspective provided by an embodiment of the present application;

Figure 3 is a partial cross-sectional view of the crossbeam provided by the embodiment of the present application;

Figure 4 is a schematic structural diagram of a beam provided by an embodiment of the present application;

Figure 5 is an exploded view of the beam provided by the embodiment of the present application;

Figure 6 is a partial cross-sectional view of a crossbeam provided by an embodiment of the present application.

In the picture:

1. Cross beam; 11. Body; 111. First hole position; 112. Weight reduction hole; 12. Mounting structure; 121. First boss; 122. Second boss; 123. Connection hole; 1231. Step hole ; 1232. Threaded hole; 124. Splicing component; 1241. Cylinder; 1242. Connecting rod; 1243. Nut; 1244. First sealing ring; 1245. Second sealing ring;

100. Connectors.

Detailed ways

In the description of this application, unless otherwise explicitly stipulated and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body. ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the meanings of the above terms in this application can be understood according to the circumstances.

In this application, unless otherwise explicitly stated and limited, the term "above" or "below" a first feature on a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them. Furthermore, the terms "above", "above" and "above" a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature. “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.

Embodiment 1

This embodiment provides a battery pack, as shown in Figures 1 to 3, including a box with a bottom guard and a crossbeam 1 disposed in the box. The crossbeam 1 includes a body 11 and a hanger integrally formed with the body 11. The loading structure 12 has a cross beam 1 connected to the bottom guard, and the mounting structure 12 is sealingly connected to the bottom guard. The mounting structure 12 is provided with a connection hole 123, and the mounting structure 12 is connected to the external structure through the connection hole 123.

The mounting structure 12 and the body 11 are integrally formed to form a cross beam 1. The cross beam 1 is installed in the box and connected to the bottom guard plate. The connection between the mounting structure 12 and the external structure is realized by passing through the connecting hole 123 through the connecting piece. For example, the connecting piece can be Fasteners or multiple matching fasteners can be selected and installed according to the actual situation; the installation operation is more convenient, reduces the number of parts, simplifies the structure, reduces sealing installation, greatly improves waterproof reliability, and reduces Risk factor; there is no need to assemble the mounting structure 12 separately, which improves production efficiency and applicability to the box space; there is no need to dig holes on the beam 1 to install the mounting structure 12, which improves the structural strength of the beam 1 , improved anti-vibration performance. This solves a series of problems existing in the independently installed mounting structure 12 in the related art, such as large installation size, difficulty in waterproof sealing, and complex assembly operations.

For example, as shown in FIG. 1 , the bottom guard is provided with mounting holes. The mounting structure 12 includes a first boss 121 protruding from the side of the body 11 facing the bottom guard. Some connection holes 123 are opened in the first boss. In the platform 121, the first boss 121 is passed through the mounting hole, and the first boss 121 is sealingly connected with the mounting hole. The mounting hole is used to circumferentially limit the first boss 121, and at the same time, the first boss 121 is added. The contact area between 121 and the mounting hole improves the connection reliability. In this embodiment, the first boss 121 is welded to the mounting hole, thereby realizing a sealed connection between the first boss 121 and the mounting hole, thereby realizing a sealed connection between the mounting structure 12 and the bottom guard; for example, the first boss 121 121 and the mounting hole are fully welded and sealed to improve the sealing effect. In other embodiments, a sealing ring may also be provided between the first boss 121 and the mounting hole to achieve sealing. In other embodiments, the first boss 121 can also be in contact with the inside of the bottom guard plate, the connecting hole 123 is connected with the mounting hole, and the connecting piece passes through the mounting hole and the connecting hole 123 to connect the external structure with the mounting structure 12 .

Exemplarily, as shown in FIGS. 1 and 3 , the mounting structure 12 includes a second boss 122 protruding from the side of the body 11 facing away from the bottom guard. A portion of the connection hole 123 is opened in the second boss 122 . The second boss 122 is provided to increase the height of the mounting structure 12 , and the mounting structure 12 is connected to the external structure through the second boss 122 . For example, the connection hole 123 includes a threaded hole 1232 opened in the second boss 122, and the external structure is threadedly connected to the threaded hole 1232 to facilitate disassembly and assembly.

For example, as shown in FIG. 3 , the connection hole 123 is a communication hole, which reduces the weight of the mounting structure 12 . Optionally, the connection hole 123 includes a stepped hole 1231 opened in the first boss 121. The stepped hole 1231 is connected with the threaded hole 1232 to form a communication hole for connecting with the external structure through fasteners. For example, there is a through hole between the stepped hole 1231 and the threaded hole 1232, and the connecting piece is passed through the stepped hole 1231 and the threaded hole 1232 to realize the connection between the mounting structure 12 and the external structure.

Optionally, the box is also provided with a cover plate, and the box body and the cover plate form a sealed accommodation space for accommodating the battery module, the cross beam 1 and other structures. When the distance between the cover plate and the bottom guard plate is large, in this embodiment, the second boss 122 is sealingly connected with the cover plate to prevent the size of the cross beam 1 body 11 from being too large and affecting the weight of the arrangement, and to reduce the occupied space. For example, a sealing member is provided between the second boss 122 and the cover plate to achieve a sealed connection. For example, a sealing groove is provided on the top of the second boss 122, and the sealing member is provided in the sealing groove and is provided between the cover plate and the second boss 122 to achieve a sealing connection; or, optionally, the second boss 122 is also The hole groove on the cover plate can be penetrated, and the second boss 122 is circumferentially limited through the hole groove, thereby limiting the position of the cross beam 1 and improving the connection stability and reliability. A sealing groove is provided on the outer periphery, and the sealing member is sleeved in the sealing groove and disposed between the cover plate and the second boss 122 to achieve a sealing connection.

For example, as shown in FIG. 2 , the body 11 is provided with a weight reduction hole 112 to reduce weight and thereby reduce the overall weight of the battery pack.

Optionally, the battery pack also includes a battery module installed on the bottom guard. The battery module is housed in the box to protect the battery module. As shown in Figure 1, the body 11 is provided with a first hole 111. The battery module is provided with a second hole, and bolts are passed through the first hole 111 and the second hole to connect the battery module to the body 11 to achieve a detachable connection between the battery module and the crossbeam 1; for example, There are multiple cross beams 1 in the battery pack, and the battery module is located between the two cross beams 1. The cross beam 1 is used to limit the position of multiple battery modules, thereby improving connection reliability.

Exemplarily, as shown in Figures 1 and 2, the body 11 is provided with a plurality of spaced mounting structures 12 and a plurality of first holes 111, and the multiple mounting structures 12 and the plurality of first holes 111 alternate. Interval settings.

Since the crossbeam 1 is used to support and connect the battery module, the crossbeam 1 is affected by the gravity of the battery module. In this embodiment, as shown in Figures 1 to 3, the first boss 121 is cylindrical and can be stably supported on the crossbeam. 1 and the bottom guard plate; optionally, the second boss 122 is in the shape of a truncated cone, supported between the cross beam 1 and the cover plate, and mainly plays a supporting role. The truncated cone shape can reduce the weight and occupy space.

In this embodiment, the mounting structure 12 and the body 11 are formed by casting, which is simple and convenient to manufacture. In one embodiment, the processing steps of the crossbeam 1 are: the mounting structure 12 and the body 11 are die-cast at one time, and then the first hole 111 on the body 11 is machined using CNC, and the surface flatness of the body 11 is processed. Then the cross beam 1 is assembled and connected with the bottom guard plate and other structures. In other embodiments, the mounting structure 12 and the body 11 can also be formed into an integrated structure through machining or other methods.

This embodiment also provides a vehicle, including the above-mentioned battery pack, the mounting structure 12 and the body 11 are integrally formed to form the cross beam 1, which solves the problems of large installation size and waterproof sealing difficulties of the independently installed mounting structure 12 in the related art. , complex assembly operations and a series of other problems. By using the above-mentioned battery pack, the reliability of the vehicle is improved and the cost is reduced.

Embodiment 2

This embodiment also provides a battery pack and a vehicle including the battery pack. The structure of this embodiment is basically the same as that of Embodiment 1. The same parts as those of Embodiment 1 will not be described again. In this embodiment, as shown in Figures 4-6, the mounting structure 12 also includes a splicing component 124 located on the side of the second boss 122 away from the body 11. The splicing component 124 is detachably connected to the connecting hole 123. The splicing component 124 is provided with a hole, for example, the hole can be connected with the connecting hole 123, and the mounting structure 12 is connected to the external structure through the hole. The height of the mounting structure 12 can be increased. When the height dimension between the cover and the bottom guard is relatively large, the structure of the splicing assembly 124 is used to increase the height of the mounting structure 12 to reduce the distance between the mounting structure 12 and the body 11 Due to the large size and difficulty of die-casting, the height of the splicing component 124 can be adjusted according to actual needs.

Exemplarily, as shown in FIGS. 5 and 6 , the splicing assembly 124 includes a cylinder 1241 and a nut 1243 with a connecting rod 1242 at one end. The cylinder 1241 is sealingly connected to the connecting hole 123 of the second boss 122 , and the connecting rod 1242 is sealingly connected to the connecting hole 123 of the second boss 122 . The side of the cylinder 1241 facing away from the second boss 122. In this embodiment, the internal threaded hole of the nut 1243 is connected with the first hole structure on the connecting rod 1242 and the second hole structure on the cylinder 1241 to form a hole groove, and the hole groove and The connecting holes 123 are connected, and the connecting piece 100 is installed in the connecting holes 123 and the hole slot. In other embodiments, the internal threaded hole of the nut 1243 may also form a hole groove, or the internal threaded hole of the nut 1243 and the first hole structure on the connecting rod 1242 may be connected to form a hole groove, which may be set according to the actual connection method. Illustratively, the cylinder 1241 is connected to the threaded hole 1232 on the second boss 122; for example, a first sealing ring 1244 is provided between the nut 1243 with the connecting rod 1242 and the cylinder 1241, and between the cylinder 1241 and the second boss 122 There is a second sealing ring 1245 between them to achieve a sealed connection.

Claims

A battery pack includes a box with a bottom guard and a crossbeam (1) provided in the box. The crossbeam (1) includes a body (11) and a hanger integrally formed with the body (11). Loading structure (12), the cross beam (1) is connected to the bottom guard plate, the mounting structure (12) is sealingly connected to the bottom guard plate, and the mounting structure (12) is provided with a connection hole (123), the mounting structure (12) is connected to the external structure through the connection hole (123).
The battery pack according to claim 1, wherein the bottom guard plate is provided with mounting holes, and the mounting structure (12) includes a third protruding portion on the side of the body (11) facing the bottom guard plate. A boss (121), part of the connecting hole (123) is opened in the first boss (121), the first boss (121) is penetrated in the mounting hole, and the first The boss (121) is sealingly connected to the mounting hole.
The battery pack according to claim 2, wherein the first boss (121) is welded to the mounting hole.
The battery pack according to claim 2, wherein the connection hole (123) is a communication hole.
The battery pack according to claim 1, wherein the mounting structure (12) includes a second boss (122) protruding on a side of the body (11) away from the bottom guard, and part of the The connecting hole (123) is opened in the second boss (122).
The battery pack according to claim 5, wherein the connection hole (123) includes a threaded hole (1232) opened in the second boss (122).
The battery pack according to claim 5, wherein the mounting structure (12) further includes a splicing component (124) provided on the side of the second boss (122) away from the body (11), so The splicing component (124) is detachably connected to the connecting hole (123). The splicing component (124) is provided with a hole slot, and the mounting structure (12) is connected to the external structure through the hole slot.
The battery pack according to claim 7, wherein the splicing assembly (124) includes a cylinder (1241) and a nut (1243) with a connecting rod (1242) at one end, and the cylinder (1241) is sealingly connected to the first The connecting hole (123) of the two bosses (122), the connecting rod (1242) is sealingly connected to the side of the cylinder (1241) away from the second boss (122), and the nut (1243 ) forms the hole groove, or the internal thread hole of the nut (1243) communicates with the first hole structure on the connecting rod (1242) to form the hole groove, or the nut (1243) The internal threaded hole of 1243) is connected with the first hole structure on the connecting rod (1242) and the second hole structure on the cylinder (1241) to form the hole groove.
The battery pack according to any one of claims 1 to 8, wherein the mounting structure (12) and the cross beam (1) are formed by casting.
The battery pack according to any one of claims 1 to 8, further comprising a battery module set on the bottom guard, the body (11) having a first hole (111), the battery module The assembly is provided with a second hole, and bolts are passed through the first hole (111) and the second hole to connect the battery module to the body (11).
The battery pack according to claim 1, wherein the mounting structure (12) includes a first boss (121) protruding from a side of the body (11) facing the bottom guard, and the A boss (121) is cylindrical.
The battery pack according to claim 1 or 11, wherein the mounting structure (12) includes a second boss (122) protruding on a side of the body (11) away from the bottom guard, so The second boss (122) is in the shape of a truncated cone.
A vehicle including the battery pack according to any one of claims 1-12.